高纯微晶碳酸锰制备中的粒度和质量控制

Controlling of the particle size in the preparation process of manganese carbonate and its effect on the product quality

以碳酸锰矿为原料 ,采用锰矿酸浸出 锰浸出液净化 碳化结晶工艺制备高纯碳酸锰 .对结晶过程中影响晶体粒度的工艺参数进行了试验和讨论 .研究结果表明 :在碳酸锰结晶过程中 ,当碳酸锰晶体粒度一定时 ,产品中的杂质含量出现极限值 ,若晶体粒度增大 ,则极限值也随之增大 ,即产品质量与碳酸锰粒度密切相关 ;碳酸锰产品粒度可以通过调整结晶温度和溶液过饱和度来降低 ,在适当的条件下 ,碳酸锰平均粒度可以控制在 5 μm ,从而有效地降低了产品中的杂质含量 .

The high purity manganese carbonate is crystallized from manganese leaching solution. Experiments show that there exists a limit value at impurity content, when particle size of manganese carbonate keeps constant in the crystalling process. The limit value increases in pace with the rising of particle size. Therefore the particle size of manganese carbonate will influence product quality extremely. The technology parameters which affect the particle size were tested and discussed. The results show that the average particle size of manganese carbonate can be controlled at about 5 μm, under proper conditions, and the inpurity content in product can be decreased effectively.